66131242452445 has 8 divisors (see below), whose sum is σ = 80249148145080. Its totient is φ = 52310555827200.

The previous prime is 66131242452433. The next prime is 66131242452461. The reversal of 66131242452445 is 54425424213166.

66131242452445 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 2208962842564 + 63922279609881 = 1486258^2 + 7995141^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 66131242452445 - 2¹⁷ = 66131242321373 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 74304766356 + ... + 74304767245.

It is an arithmetic number, because the mean of its divisors is an integer number (10031143518135).

Almost surely, 2^{66131242452445} is an apocalyptic number.

It is an amenable number.

66131242452445 is a deficient number, since it is larger than the sum of its proper divisors (14117905692635).

66131242452445 is a wasteful number, since it uses less digits than its factorization.

66131242452445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 148609533695.

The product of its digits is 5529600, while the sum is 49.

The spelling of 66131242452445 in words is "sixty-six trillion, one hundred thirty-one billion, two hundred forty-two million, four hundred fifty-two thousand, four hundred forty-five".